The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/db9fc12b563cc860af67e91a571c262afcef72f8

commit db9fc12b563cc860af67e91a571c262afcef72f8
Author: jif <jif@chromium.org>
Date: Mon Jun 12 14:50:46 2017

[iOS] Break retain cycle in InfoBars.

This CLs breaks retain cycles such as:
InfoBarView -> LabelLinkController ->
BeforeTranslateInfoBarController -> InfoBarView

BUG= 732384 

Review-Url: https://codereview.chromium.org/2933833002
Cr-Commit-Position: refs/heads/master@{#478618}

[modify] https://crrev.com/db9fc12b563cc860af67e91a571c262afcef72f8/ios/chrome/browser/infobars/confirm_infobar_controller.mm
[modify] https://crrev.com/db9fc12b563cc860af67e91a571c262afcef72f8/ios/chrome/browser/passwords/update_password_infobar_controller.mm
[modify] https://crrev.com/db9fc12b563cc860af67e91a571c262afcef72f8/ios/chrome/browser/translate/before_translate_infobar_controller.mm